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Reports <code>String</code> method calls that always return the same value (<code>-1</code> or <code>false</code>)
because a lowercase character is searched in an uppercase-only string or vice versa.
<p>Reported methods include <code>equals</code>, <code>startsWith</code>, <code>endsWith</code>, <code>contains</code>,
  <code>indexOf</code>, and <code>lastIndexOf</code>.</p>
<p><b>Example:</b></p>
<pre>
  if (columnName.toLowerCase().equals("ID")) {...}
</pre>
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<p><small>New in 2019.3</small></p>
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